Nural Pistons

[vladandrei51]

Hello,

I want to proactively change the pistons on my 09 1.4 TSI scirocco. Besides the ones from the VW (which are not cheap) I've only found Nural pistons to have the OEM code of only CTHD pistons (03C107065CK). namely these: https://www.autodoc.co.uk/nural/10354030" onclick="window.open(this.href);return false;

Do you guys reckon it's worth going for the original VW pistons or I'm fine with Nural? Any of you used these? Those are twice as cheap as the VW ones and I'm not really sitting on a pile of cash but I also don't want to go from shitty pistons to sightly less shitty

Or you you have OEM alternatives for CTHD pistons, I'm all ears

Thanks

[spuf]

Hello hello.
I would generally say yes to Nural pistons(they are a part of Federal Mogul group so no problem here), but for this particular engine, I would stay on the very safe side.
First of first, there are no CTHD pistons. After 2012, all 1.4 TSI engines have the new and improved pistons. There is a whole story here. Mahle was the original manufacturer of pistons, and they kinda screwed up. After 2012, Kolbenschmidt redesigned the pistons, and the "cthd" piston was borned.

So, you basically have 3 large options:
- OEM pistons
- Kolbenschmidt pistons(these are the same pistons as the OEM, but at a good price, and a nice box)
- performance pistons(Wossner etc)

Here is the part code for the Kolbenschmidt piston: 40846600

Next time, give me a call 0723553802

[vladandrei51]

Thanks man, you are a real savior, haha.

Regarding the KS Pistons, are you 100% sure those are post 2012 pistons as found in cthd? The KS pistons have also piston part number found in CAVD engines (OE pistns and Nural does not), furthermore, there are online parts stores (which was confirmed by a family friend who runs a part store) which doesn't state CK part number (as in the post 2012 pistons) for the 40846600.

For example: https://m.motor-doctor.co.uk/products/7920224-piston" onclick="window.open(this.href);return false;

03C 107 065 CF, the latest part number for those pistons says it's a canceled piston build since 2012, see here http://www.oemepc.com/vw/part_single/ca ... d/0/lang/e" onclick="window.open(this.href);return false;

[spuf]

Yes, I am 100% sure, as my info was confirmed by a Kolbenschmidt rep.
Parts cross reference generally works for the OE codes, not aftermarket.
If you want to check aftermarket parts, always use the manufacturer catalogue, or contact them directly. https://onlineshop.ms-motorservice.com/ ... t&app=shop" onclick="window.open(this.href);return false;

Otherwise, KS lists the piston for the CTHD engine(of course they do, they make it for the VW factory).

Here you can see a OEM piston in the box: http://www.vag-express.ru/86046/" onclick="window.open(this.href);return false;
If you look carefully in the third picture, you can see the VW logo in the left, and the KS logo in the right.
And here you have a KS aftermarket piston: http://spufy1.ddns.net:5000/sharing/7X0ewImxE" onclick="window.open(this.href);return false;

[vladandrei51]

Ok, fair enough, I did some digging too and everything you've said checks out.

It's just the fear that for most car parts stores for the KS piston the CK part number isn't listed only up to CF or whatever, yet a lot of people on this forum say KS pistons replace the Mahle shitty pistons.

[spuf]

If you want to sleep well, buy the OEM piston, and call it a day

[vladandrei51]

I might, but atm I'm just really trying to get as much information as possible since the rebuilt is scheduled only 3-4 weeks by now.

Wossners are also a possibility too, and since you obviously know more about mechanical stuff than me I gotta ask: if I buy this kit (http://www.forgedpistonparts.com/vw-gol ... si-1-4ltr/" onclick="window.open(this.href);return false;) do I need anything else for complete piston replacement besides some gaskets, like rods or whatever?

[spuf]

If you buy them in standard size, then you don't need other parts besides the regular(full gasket set - no exception; bolts etc)

[herwintan]

Hello hello.
I would generally say yes to Nural pistons(they are a part of Federal Mogul group so no problem here), but for this particular engine, I would stay on the very safe side.
First of first, there are no CTHD pistons. After 2012, all 1.4 TSI engines have the new and improved pistons. There is a whole story here. Mahle was the original manufacturer of pistons, and they kinda screwed up. After 2012, Kolbenschmidt redesigned the pistons, and the "cthd" piston was borned.

So, you basically have 3 large options:
- OEM pistons
- Kolbenschmidt pistons(these are the same pistons as the OEM, but at a good price, and a nice box)
- performance pistons(Wossner etc)

Here is the part code for the Kolbenschmidt piston: 40846600

Next time, give me a call 0723553802

Hi spuf, i have a 2012 1.4 tsi but the engine code is CAVD. Does this mean i have the new and improved pistons? Is there any way to check which pistons i have without disassembling the engine?

[vladandrei51]

If it's cavd it's probably the old ones

[herwintan]

If it's cavd it's probably the old ones

Hi vladandrei51, thanks for your reply. I noticed that you used wossner piston.

I'm planning to get Revo stage 2 remap, so I'm considering upgrading to that piston myself. I'm wondering what other parts do I need to buy other than the piston set itself to get the installation done?

Or do you think it should be fine with the stock pistons?

[vladandrei51]

No way with CAVD pistons. My compression was perfect before I got forged pistons yet the mechanic when I did the upgrade said the rings were slowly starting to go bad (and I had 0.5-1l oil consumption at 7500-10k km).

I would go with either KS chtd pistons or wossner if you're willing to pay a little extra

[herwintan]

I had the same problem, my engine have around 1l oil consumption at 6k-10k km

Came across this kit:

https://www.aliexpress.com/item/100-Bra ... 3c00cDkZhK" onclick="window.open(this.href);return false;

Does this have all the right parts? Is it a good price?

[vladandrei51]

I'm not sure mate, I went to the mechanic with the wossner pistons and couple of gaskets and I've told him to just buy whatever it was also necessary.

If you buy a kit like this please make sure the pistons part number ends with CK, or has Kolbenschmidt pistons. However, I strongly advice you to just get the pistons to the mechanic and tell him to order separately whatever additional parts he needs (there are tons of gaskets, bolts etc).